For the digging cost please then consider using the ground only as a heat source/sink for a heatpump. Trying to use the ground temperature at existing value has such a low delta-T as to be useless compared to the cost. Bob
On Sun, Mar 21, 2021 at 6:48 PM BobK via EV <ev@lists.evdl.org> wrote: > Lee Hart, For my earth tubes I was thinking of at least 8 inches diameter. > I’ve not decided on the number of tubes. The end away from the house would > drain into a sump. The sump would be enough for a small sump pump that > would get rid of the water. Any suggestion are welcome. > > Bobby Keeland > Louisiana > > Sent from my iPhone 7 > > > On Mar 21, 2021, at 1:28 PM, Lee Hart via EV <ev@lists.evdl.org> wrote: > > > > Robert Bruninga via EV wrote: > >> The cheapest DIY ground-source heating is to hang an old Air > >> Conditioner from the floor joists of a popular central room in the house > >> and cut a hole in the floor to connect the hot side of the AC to the > room. > >> The cold side remains in the basement air. A 10,000 BTU AC unit > becomes a > >> 20,000 BTu heatpump.... > > > > Even easier; I leave my furnace's air intake open in the basement in the > summer. The furnace blower pulls cooler air from the basement, runs it > through the air conditioner, and it into the house. It has the additional > benefit of reducing the humidity in the basement, where I'd otherwise need > a dehumidifier. > > > > Then, there is my grandpa's solution. He lived in the basement. :-) > > > > Lee > > > > -- > > All children are born engineers. Watch them at play. They're not > > just playing; they're experimenting, building and learning. That's > > engineering! Then we get them in school and squash it out of them. > > (Geoffrey Orsak, Southern Methodist University dean of engineering) > > -- > > Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com > > > > -- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > _______________________________________________ > > Address messages to ev@lists.evdl.org > > No other addresses in TO and CC fields > > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > > ARCHIVE: http://www.evdl.org/archive/ > > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/ > LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210321/5815b1c6/attachment.html> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
